path: root/client.c

/*
 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
 * See LICENSE file for license details.
 */
#include "dwm.h"
#include <stdlib.h>
#include <string.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>

/* static functions */

static void
grabbutton(Client *c, unsigned int button, unsigned int modifier)
{
	XGrabButton(dpy, button, modifier, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, button, modifier | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, button, modifier | numlockmask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
	XGrabButton(dpy, button, modifier | numlockmask | LockMask, c->win, False, BUTTONMASK,
			GrabModeAsync, GrabModeSync, None, None);
}

static void
resizetitle(Client *c)
{
	int i;

	c->tw = 0;
	for(i = 0; i < ntags; i++)
		if(c->tags[i])
			c->tw += textw(tags[i]);
	c->tw += textw(c->name);
	if(c->tw > c->w)
		c->tw = c->w + 2;
	c->tx = c->x + c->w - c->tw + 2;
	c->ty = c->y;
	if(isvisible(c))
		XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
	else
		XMoveResizeWindow(dpy, c->title, c->tx + 2 * sw, c->ty, c->tw, c->th);

}

static void
ungrabbutton(Client *c, unsigned int button, unsigned int modifier)
{
	XUngrabButton(dpy, button, modifier, c->win);
	XUngrabButton(dpy, button, modifier | LockMask, c->win);
	XUngrabButton(dpy, button, modifier | numlockmask, c->win);
	XUngrabButton(dpy, button, modifier | numlockmask | LockMask, c->win);
}

static int
xerrordummy(Display *dsply, XErrorEvent *ee)
{
	return 0;
}

/* extern functions */

void
ban(Client *c)
{
	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
	XMoveWindow(dpy, c->title, c->tx + 2 * sw, c->ty);
}

void
focus(Client *c)
{
	Client *old = sel;

	if(!issel)
		return;
	if(!sel)
		sel = c;
	else if(sel != c) {
		if(sel->ismax)
			togglemax(NULL);
		sel = c;
		grabbutton(old, AnyButton, 0);
		drawtitle(old);
	}
	ungrabbutton(c, AnyButton, 0);
	drawtitle(c);
	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
}

Client *
getclient(Window w)
{
	Client *c;

	for(c = clients; c; c = c->next)
		if(c->win == w)
			return c;
	return NULL;
}

Client *
getctitle(Window w)
{
	Client *c;

	for(c = clients; c; c = c->next)
		if(c->title == w)
			return c;
	return NULL;
}

void
gravitate(Client *c, Bool invert)
{
	int dx = 0, dy = 0;

	switch(c->grav) {
	default:
		break;
	case StaticGravity:
	case NorthWestGravity:
	case NorthGravity:
	case NorthEastGravity:
		dy = c->border;
		break;
	case EastGravity:
	case CenterGravity:
	case WestGravity:
		dy = -(c->h / 2) + c->border;
		break;
	case SouthEastGravity:
	case SouthGravity:
	case SouthWestGravity:
		dy = -(c->h);
		break;
	}

	switch (c->grav) {
	default:
		break;
	case StaticGravity:
	case NorthWestGravity:
	case WestGravity:
	case SouthWestGravity:
		dx = c->border;
		break;
	case NorthGravity:
	case CenterGravity:
	case SouthGravity:
		dx = -(c->w / 2) + c->border;
		break;
	case NorthEastGravity:
	case EastGravity:
	case SouthEastGravity:
		dx = -(c->w + c->border);
		break;
	}

	if(invert) {
		dx = -dx;
		dy = -dy;
	}
	c->x += dx;
	c->y += dy;
}

void
killclient(Arg *arg)
{
	if(!sel)
		return;
	if(sel->proto & PROTODELWIN)
		sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
	else
		XKillClient(dpy, sel->win);
}

void
manage(Window w, XWindowAttributes *wa)
{
	unsigned int i;
	Client *c, *tc;
	Window trans;
	XSetWindowAttributes twa;

	c = emallocz(sizeof(Client));
	c->tags = emallocz(ntags * sizeof(Bool));
	c->win = w;
	c->x = c->tx = wa->x;
	c->y = c->ty = wa->y;
	c->w = c->tw = wa->width;
	c->h = wa->height;
	c->th = bh;

	c->border = 0;
	setsize(c);

	if(c->x + c->w + 2 > sw)
		c->x = sw - c->w - 2;
	if(c->x < 0)
		c->x = 0;
	if(c->y + c->h + 2 > sh)
		c->y = sh - c->h - 2;
	if(c->h != sh && c->y < bh)
		c->y = bh;

	c->proto = getproto(c->win);
	XSelectInput(dpy, c->win,
		StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
	XGetTransientForHint(dpy, c->win, &trans);
	twa.override_redirect = 1;
	twa.background_pixmap = ParentRelative;
	twa.event_mask = ExposureMask | EnterWindowMask;

	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
			0, DefaultDepth(dpy, screen), CopyFromParent,
			DefaultVisual(dpy, screen),
			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);

	if(clients)
		clients->prev = c;
	c->next = clients;
	clients = c;

	grabbutton(c, Button1, MODKEY);
	grabbutton(c, Button2, MODKEY);
	grabbutton(c, Button3, MODKEY);

	if((tc = getclient(trans))) /* inherit tags */
		for(i = 0; i < ntags; i++)
			c->tags[i] = tc->tags[i];
	else
		settags(c);
	if(!c->isfloat)
		c->isfloat = trans
			|| (c->maxw && c->minw &&
				c->maxw == c->minw 
/* See LICENSE file for copyright and license details.
 *
 * dynamic window manager is designed like any other X client as well. It is
 * driven through handling X events. In contrast to other X clients, a window
 * manager selects for SubstructureRedirectMask on the root window, to receive
 * events about window (dis-)appearance.  Only one X connection at a time is
 * allowed to select for this event mask.
 *
 * Calls to fetch an X event from the event queue are blocking.  Due reading
 * status text from standard input, a select()-driven main loop has been
 * implemented which selects for reads on the X connection and STDIN_FILENO to
 * handle all data smoothly. The event handlers of dwm are organized in an
 * array which is accessed whenever a new event has been fetched. This allows
 * event dispatching in O(1) time.
 *
 * Each child of the root window is called a client, except windows which have
 * set the override_redirect flag.  Clients are organized in a global
 * doubly-linked client list, the focus history is remembered through a global
 * stack list. Each client contains an array of Bools of the same size as the
 * global tags array to indicate the tags of a client.  For each client dwm
 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
 * properties are updated or the client is moved/resized.
 *
 * Keys and tagging rules are organized as arrays and defined in config.h.
 *
 * To understand everything else, start reading main().
 */
#include <errno.h>
#include <locale.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <regex.h>
#include <X11/cursorfont.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xproto.h>
#include <X11/Xutil.h>

/* macros */
#define BUTTONMASK		(ButtonPressMask | ButtonReleaseMask)
#define CLEANMASK(mask)		(mask & ~(numlockmask | LockMask))
#define MOUSEMASK		(BUTTONMASK | PointerMotionMask)

/* enums */
enum { BarTop, BarBot, BarOff };			/* bar position */
enum { CurNormal, CurResize, CurMove, CurLast };	/* cursor */
enum { ColBorder, ColFG, ColBG, ColLast };		/* color */
enum { NetSupported, NetWMName, NetLast };		/* EWMH atoms */
enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */

/* typedefs */
typedef struct Client Client;
struct Client {
	char name[256];
	int x, y, w, h;
	int rx, ry, rw, rh; /* revert geometry */
	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
	int minax, maxax, minay, maxay;
	long flags;
	unsigned int border, oldborder;
	Bool isbanned, isfixed, ismax, isfloating, wasfloating;
	Bool *tags;
	Client *next;
	Client *prev;
	Client *snext;
	Window win;
};

typedef struct {
	int x, y, w, h;
	unsigned long norm[ColLast];
	unsigned long sel[ColLast];
	Drawable drawable;
	GC gc;
	struct {
		int ascent;
		int descent;
		int height;
		XFontSet set;
		XFontStruct *xfont;
	} font;
} DC; /* draw context */

typedef struct {
	unsigned long mod;
	KeySym keysym;
	void (*func)(const char *arg);
	const char *arg;
} Key;

typedef struct {
	const char *symbol;
	void (*arrange)(void);
} Layout;

typedef struct {
	const char *prop;
	const char *tags;
	Bool isfloating;
} Rule;

typedef struct {
	regex_t *propregex;
	regex_t *tagregex;
} Regs;

/* function declarations */
void applyrules(Client *c);
void arrange(void);
void attach(Client *c);
void attachstack(Client *c);
void ban(Client *c);
void buttonpress(XEvent *e);
void checkotherwm(void);
void cleanup(void);
void compileregs(void);
void configure(Client *c);
void configurenotify(XEvent *e);
void configurerequest(XEvent *e);
void destroynotify(XEvent *e);
void detach(Client *c);
void detachstack(Client *c);
void drawbar(void);
void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
void drawtext(const char *text, unsigned long col[ColLast]);
void *emallocz(unsigned int size);
void enternotify(XEvent *e);
void eprint(const char *errstr, ...);
void expose(XEvent *e);
void floating(void); /* default floating layout */
void focus(Client *c);
void focusnext(const char *arg);
void focusprev(const char *arg);
Client *getclient(Window w);
unsigned long getcolor(const char *colstr);
long getstate(Window w);
Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
void grabbuttons(Client *c, Bool focused);
unsigned int idxoftag(const char *tag);
void initfont(const char *fontstr);
Bool isarrange(void (*func)());
Bool isoccupied(unsigned int t);
Bool isprotodel(Client *c);
Bool isvisible(Client *c);
void keypress(XEvent *e);
void killclient(const char *arg);
void leavenotify(XEvent *e);
void manage(Window w, XWindowAttributes *wa);
void mappingnotify(XEvent *e);
void maprequest(XEvent *e);
void movemouse(Client *c);
Client *nexttiled(Client *c);
void propertynotify(XEvent *e);
void quit(const char *arg);
void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
void resizemouse(Client *c);
void restack(void);
void run(void);
void scan(void);
void setclientstate(Client *c, long state);
void setlayout(const char *arg);
void setmwfact(const char *arg);
void setup(void);
void spawn(const char